May threw 151 two years ago and 149 last year. He's at 144 so far this year, and I'm guessing they'd like to extend him past 150. It means he won't be pitching for Rochester in the (potential) playoffs and won't be getting called up.
They sent Escobar down to get playing time. Carroll wasn't really playing, so bringing him back doesn't make sense to me. You don't actually need two utility infielders on the bench. I think they'll replace Carroll with Mastrionni.
2004 was the last time, when they hit 191 HRs. The difference this year isn't that they are hitting more, it's that they are giving up far fewer. They are 2nd in the AL is HR allowed.
Um, no. why would the Twins want a washed up rental for the rest of this year? If they want vets to eat innings, they have Blackburn, Davies and Vasquez ready or close to it in the minors.
The cases are a bit different since Duensing is under team control for 3 more years and Morneau is a FA in 3 months. But in both cases, the return would have a better chance (however minimal) of playing a meaningful role on the next contending Twins team than 3 months of Morneau or 3 years of Duensing.